Shoulder mounter turrets for Titans

Id kinda like to see shoulder mounted turrets for titans that could replace your second gun so that you could fire everything at once and up the chaos. What are your thoughts?
As BenjaFriend suggested it could be a special skill with a set time limit and a recharge.
As Tier1Rasta suggested the recharge time of 5 minutes and a max use time of 20 seconds per use.
If you have a problem with the idea please state your reasoning if you comment.